https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109618
Bug ID: 109618 Summary: ICE: tree check: expected class ‘type’, have ‘exceptional’ (error_mark) in generic_simplify_CONVERT_EXPR, at generic-match.cc Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: anbu1024.me at gmail dot com Target Milestone: --- $ cat test.c int foo() { const unsigned int var_1 = 2; char var_5[var_1]; int var_1[10]; return sizeof(var_5); } -------------------------------- $ gcc --version gcc (GCC) 13.0.1 20230219 (experimental) Copyright (C) 2023 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. -------------------------------- $ gcc test.c test.c: In function ‘foo’: test.c:8:7: error: conflicting type qualifiers for ‘var_1’ 8 | int var_1[10]; | ^~~~~ test.c:4:22: note: previous definition of ‘var_1’ with type ‘unsigned int’ 4 | const unsigned int var_1 = 2; | ^~~~~ test.c :10:3: internal compiler error: tree check: expected class ‘type’, have ‘exceptional’ (error_mark) in generic_simplify_CONVERT_EXPR, at generic-match.cc:28499 10 | return sizeof(var_5); | ^~~~~~ 0x840637 tree_class_check_failed(tree_node const*, tree_code_class, char const*, int, char const*) ../../gcc-13-20230219/gcc/tree.cc:8959 0x8abac0 tree_class_check(tree_node*, tree_code_class, char const*, int, char const*) ../../gcc-13-20230219/gcc/tree.h:3653 0x8abac0 generic_simplify_CONVERT_EXPR gcc-13-20230219-build/gcc/generic-match.cc:28499 0xbf6848 fold_unary_loc(unsigned int, tree_code, tree_node*, tree_node*) ../../gcc-13-20230219/gcc/fold-const.cc:9341 0xbf8079 fold_build1_loc(unsigned int, tree_code, tree_node*, tree_node*) ../../gcc-13-20230219/gcc/fold-const.cc:13778 0x9429bb c_expr_sizeof_expr(unsigned int, c_expr) ../../gcc-13-20230219/gcc/c/c-typeck.cc:3096 0x97ef46 c_parser_sizeof_expression ../../gcc-13-20230219/gcc/c/c-parser.cc:8910 0x97ef46 c_parser_unary_expression ../../gcc-13-20230219/gcc/c/c-parser.cc:8803 0x97fdef c_parser_cast_expression ../../gcc-13-20230219/gcc/c/c-parser.cc:8672 0x9800df c_parser_binary_expression ../../gcc-13-20230219/gcc/c/c-parser.cc:8440 0x98154b c_parser_conditional_expression ../../gcc-13-20230219/gcc/c/c-parser.cc:8138 0x981d24 c_parser_expr_no_commas ../../gcc-13-20230219/gcc/c/c-parser.cc:8052 0x981fd1 c_parser_expression ../../gcc-13-20230219/gcc/c/c-parser.cc:11379 0x982717 c_parser_expression_conv ../../gcc-13-20230219/gcc/c/c-parser.cc:11419 0x97858b c_parser_statement_after_labels ../../gcc-13-20230219/gcc/c/c-parser.cc:6674 0x9798e4 c_parser_compound_statement_nostart ../../gcc-13-20230219/gcc/c/c-parser.cc:6296 0x99f164 c_parser_compound_statement ../../gcc-13-20230219/gcc/c/c-parser.cc:6105 0x9a10cb c_parser_declaration_or_fndef ../../gcc-13-20230219/gcc/c/c-parser.cc:2841 0x9a8a1b c_parser_external_declaration ../../gcc-13-20230219/gcc/c/c-parser.cc:1925 0x9a93f3 c_parser_translation_unit ../../gcc-13-20230219/gcc/c/c-parser.cc:1779 Please submit a full bug report, with preprocessed source (by using -freport-bug). Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions.